Multiple File or Image Upload in PHP

This examples shows how to upload Multiple file or image in PHP
Example
<html>
  <head>
    <title>File Upload in PHP</title>
  </head>
  <body>
    <form method='post' action='<?php echo $_SERVER["REQUEST_URI"];?>' enctype='multipart/form-data'>
      <label>Select Image : </label>
      <input type='file' name='file[]' multiple required>
      <input type='submit' name='submit' value='Upload'>
    </form>
    <?php 
      if(isset($_FILES["file"])){
        $uploadCount=0;
        for($i=0;$i<count($_FILES["file"]["name"]);$i++){
          $uploadFolder="upload/";
          $fileName=basename($_FILES["file"]["name"][$i]); //Get File Name 
          $fileType=pathinfo($_FILES["file"]["name"][$i],PATHINFO_EXTENSION);//Get File Extension
          $fileType=strtolower($fileType); //convert to lowercase
          $uploadFile=rand(1000,10000).rand(1000,10000).".".$fileType; //Set File name with Random Number
          //Check File Size greater than 300KB
          if($_FILES["file"]["size"][$i]>300000){
            echo $fileName." Upload Failed.File Size is too Large!!!<br>";
          }
          //Check File Extension
          else if($fileType != 'jpg'&&$fileType != 'jpeg'&&$fileType != 'png' && $fileType != 'gif'){
            echo  $fileName." Upload Failed.Invalid File!!!<br>";
          }
          //Check Upload Folder 
          else if(!is_dir($uploadFolder)){
            echo  $fileName." Upload Failed.Upload Folder not exists!!!<br>";
          }
          //Check File Name
          else if(file_exists($uploadFile)){
            echo  $fileName." Upload Failed.File Already Exists!!!<br>";
          }
          //Upload File
          else{
            //Move file into 'upload' Folder
            if(move_uploaded_file($_FILES["file"]["tmp_name"][$i],$uploadFolder.$uploadFile)){
              $uploadCount++;
            }
          }
        }
        echo "<h5>".$uploadCount." File Uploaded Successfully</h5>";
      }
    ?>
  </body>
</html>